CN112963639A - High low temperature high pressure flange connection interface flexible self-locking sealing device - Google Patents
High low temperature high pressure flange connection interface flexible self-locking sealing device Download PDFInfo
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- CN112963639A CN112963639A CN202110417081.5A CN202110417081A CN112963639A CN 112963639 A CN112963639 A CN 112963639A CN 202110417081 A CN202110417081 A CN 202110417081A CN 112963639 A CN112963639 A CN 112963639A
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- 238000007789 sealing Methods 0.000 title claims abstract description 69
- 239000002184 metal Substances 0.000 claims description 3
- 239000013013 elastic material Substances 0.000 claims description 2
- 229910052755 nonmetal Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention provides a flexible self-locking sealing device for a high-low temperature high-pressure flange connection interface, and belongs to the technical field of flange connection sealing. Comprises an upper flange, a lower flange and an annular flexible structure sealing element arranged between the two flanges. The upper surface and the lower surface of the annular flexible structure sealing element are respectively provided with a protruding annular wedge-shaped block. The inner sides of the flange plates are provided with annular grooves, and the section shapes of the annular grooves are wedge-shaped and are matched with annular wedge blocks protruding from the upper part and the lower part of the annular flexible structure sealing element. Through holes are processed at the edges of the two flange plates, and after the flange plates are fixed through bolts, the annular flexible structure sealing element is in a pressed state to provide initial sealing. The invention has simple and reliable structure, easy processing, compatibility with various structures, difficult damage, repeated use, long service life and suitability for high and low temperature environment; and the larger the internal pressure is, the more remarkable the sealing effect is, and a series of fatal problems of the existing flange sealing structure are greatly solved.
Description
Technical Field
The invention belongs to the technical field of flange connection sealing, and relates to a flexible self-locking sealing device for a high-low temperature high-pressure flange connection interface.
Background
Aerospace, aviation and nuclear power equipment work in severe environments such as high temperature/low temperature, high pressure, radiation and the like, a large number of flanges are connected in a system, and the sealing technology of a connecting surface is generally direct sealing of a metal contact surface. However, the flange plates are generally connected by bolts, the contact pressure of the sealing surfaces is reduced under the action of internal high pressure, the tensile force of the bolts is increased, the leakage rate is increased, and the problem of sealing the connection interface of the high-temperature and high-pressure flange is always an international problem. The flange joint face is used as a second sealing face, and the sealing reliability is further improved. This patent technique also can popularize to other sealed fields.
Disclosure of Invention
The invention designs a high-low temperature high-pressure flange connection interface flexible self-locking sealing device aiming at the problems that the flange connection of aerospace, aviation and nuclear power equipment has reduced contact pressure, increased bolt tension and increased leakage rate under the action of internal high pressure under the severe environments of high temperature/low temperature, high pressure, radiation and the like. Compared with a conventional sealing mode, the flange is only fastened by bolts, after repeated pressurization and pressure relief, the sealing surface of the flange is opened or abraded to increase the leakage rate, and the sealing element with the annular flexible structure can elastically recover to avoid the problem of uniform service.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a high low temperature high pressure flange interface flexibility is from locking sealing device, includes ring flange 1, ring flange 2, annular flexible structure sealing element 3, and annular flexible structure sealing element 3 locates between ring flange 1 (last ring flange), ring flange 2 (lower ring flange).
The annular flexible structure sealing element 3 is of a hollow structure, and the upper surface and the lower surface of the annular flexible structure sealing element are respectively provided with an annular wedge block 4 and an annular wedge block 5 which protrude out and have the same size; the angle range alpha of the annular wedge- shaped blocks 4 and 5 is 1-179 degrees, preferably 5-179 degrees, wherein the angle is the angle between the inclined edge of the annular wedge-shaped block and the vertical plane as shown in fig. 5; the height h of the annular wedge-shaped block is more than or equal to 0.1 mm, preferably 0.1-100 mm; the number n of the upper and lower annular wedge blocks is more than or equal to 1, preferably 1-10.
The inner side of the flange plate 1 is provided with an annular groove 6, the inner side of the flange plate 2 is provided with an annular groove 7, the sections of the annular groove 6 and the annular groove 7 are in wedge shapes, and the annular groove 6 and the annular groove 7 are respectively matched with an annular wedge block 4 and an annular wedge block 5 which are protruded from the upper part and the lower part of the annular flexible structure sealing element 3.
The gap distance d between the upper surface of the annular wedge-shaped block and the lower surface of the annular groove is not less than 0.2 mm. The gap distance s between the surface of the annular flexible structure sealing element 3 and the inner side surface of the flange is larger than d. Through holes are processed at the edges of the flange plate 1 and the flange plate 2 and used for fixing bolts 8. After the flange plate 1 and the flange plate 2 are fixed through the bolts 8, the annular flexible structure sealing element 3 is in a compressed state to provide initial sealing.
In use, the annular flexible structural sealing element 3 is in compression to provide an initial seal when the flange 1 and flange 2 are secured by the bolts 8. Because the interior of the annular flexible structure sealing element 3 is of a hollow structure, when the pressure in the sealing device is higher, the outward opening angle of the annular flexible structure sealing element 3 is larger, and the sealing performance is better. In addition, when the internal pressure of the sealing device is reduced, the annular flexible structure sealing element 3 can be restored, and elastic adjustment can be realized.
Further, the annular flexible structure sealing element 3 may be made of metal, nonmetal or other elastic materials.
Compared with the prior art, the invention has the beneficial effects that:
compared with the existing flange sealing structure, the flange sealing structure is simple and reliable in structure, easy to process, compatible with various structures, not prone to damage, capable of being used repeatedly, long in service life, and applicable to high and low temperature environments, the larger the internal pressure is, the more remarkable the sealing effect is, and a series of fatal problems of the existing flange sealing structure are greatly solved.
Drawings
FIG. 1 is a schematic view of a conventional flange seal connection; FIG. (a) is a front view, and FIG. (b) is a sectional view;
FIG. 2 is a schematic view of a flexible self-locking sealing device for a high-low temperature high-pressure flange connection interface; FIG. (a) is a front view, and FIG. (b) is a sectional view;
FIG. 3 is a partially enlarged view of the seal;
FIG. 4 is a schematic view of an annular flexible structural sealing element; FIG. (a) is a front view, and FIG. (b) is a plan view;
FIG. 5 is a diagram illustrating relevant parameters at the seal;
fig. 6 is a schematic diagram of the number n of annular wedges being 2.
In the figure: 1, a flange plate; 2, a flange plate; 3 an annular flexible structural sealing element; 4, an annular wedge-shaped block; 5, an annular wedge-shaped block; 6, an annular groove; 7 annular grooves.
Detailed Description
The present invention is further illustrated by the following specific examples.
The utility model provides a high low temperature high pressure flange interface flexibility is from locking sealing device, includes ring flange 1, ring flange 2, annular flexible structure sealing element 3, and annular flexible structure sealing element 3 locates between ring flange 1 (last ring flange), ring flange 2 (lower ring flange).
The upper surface and the lower surface of the annular flexible structure sealing element 3 are respectively provided with a protruding annular wedge block 4 and an annular wedge block 5, the angle range alpha of the annular wedge blocks 4 and 5 is 35 degrees, the height of the annular wedge blocks is 0.2mm, and the number of the upper annular wedge blocks and the lower annular wedge blocks is 1.
The inner side of the flange plate 1 is provided with an annular groove 6, the inner side of the flange plate 2 is provided with an annular groove 7, the sections of the annular groove 6 and the annular groove 7 are in wedge shapes, and the annular groove 6 and the annular groove 7 are respectively matched with an annular wedge block 4 and an annular wedge block 5 which are protruded from the upper part and the lower part of the annular flexible structure sealing element 3.
The gap distance d between the upper surface of the annular wedge block and the lower surface of the annular groove is 0.25 mm. The gap distance s between the surface of the annular flexible structure sealing element 3 and the inner side surface of the flange is larger than d. Through holes are processed at the edges of the flange plate 1 and the flange plate 2 and used for fixing bolts 8. After the flange plate 1 and the flange plate 2 are fixed through the bolts 8, the annular flexible structure sealing element 3 is in a compressed state to provide initial sealing.
The above-mentioned embodiments only express the embodiments of the present invention, but not should be understood as the limitation of the scope of the invention patent, it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the concept of the present invention, and these all fall into the protection scope of the present invention.
Claims (2)
1. The flexible self-locking sealing device for the high-low-temperature high-pressure flange connection interface is characterized by comprising a flange plate (1), a flange plate (2) and an annular flexible structure sealing element (3), wherein the annular flexible structure sealing element (3) is arranged between the flange plate (1) and the flange plate (2);
the annular flexible structure sealing element (3) is of a hollow structure, and the upper surface and the lower surface of the annular flexible structure sealing element are respectively provided with a protruding annular wedge-shaped block (4) and a protruding annular wedge-shaped block (5); the inner sides of the flanges (1) and (2) are respectively provided with an annular groove (6) and an annular groove (7), the section of each annular groove is wedge-shaped and is respectively matched with the annular wedge-shaped blocks (4) and (5); through holes are processed at the edges of the flange plate (1) and the flange plate (2); after the two flange plates are fixed through the bolts (8), the annular flexible structure sealing element (3) is in a pressed state to provide initial sealing; when the pressure in the sealing device is higher, the outward opening angle of the annular flexible structure is larger, and the sealing performance is better; when the internal pressure of the sealing device is reduced, the sealing element (3) with the annular flexible structure can recover, so that elastic adjustment can be realized;
the angle range alpha of the annular wedge-shaped block is 1-179 degrees; the height h of the annular wedge-shaped block is more than or equal to 0.1 mm; the number n of the upper and lower annular wedge blocks is more than or equal to 1; the gap distance d between the upper surface of the annular wedge-shaped block and the lower surface of the annular groove is not less than 0.2 mm; the gap distance s between the surface of the annular flexible structure sealing element (3) and the inner side surface of the flange is larger than d.
2. The high-low temperature high-pressure flange connection interface flexible self-locking sealing device as claimed in claim 1, wherein the annular flexible structure sealing element (3) can be made of metal, nonmetal or other elastic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110417081.5A CN112963639A (en) | 2021-04-19 | 2021-04-19 | High low temperature high pressure flange connection interface flexible self-locking sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110417081.5A CN112963639A (en) | 2021-04-19 | 2021-04-19 | High low temperature high pressure flange connection interface flexible self-locking sealing device |
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| Publication Number | Publication Date |
|---|---|
| CN112963639A true CN112963639A (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110417081.5A Pending CN112963639A (en) | 2021-04-19 | 2021-04-19 | High low temperature high pressure flange connection interface flexible self-locking sealing device |
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| CN (1) | CN112963639A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070024007A1 (en) * | 2005-07-28 | 2007-02-01 | Putch Samuel W | Seal ring and method |
| CN200943788Y (en) * | 2006-08-28 | 2007-09-05 | 刘星海 | Impact-resistant high temperature-resistant elastic sealing member and flange matched with same |
| BRPI0702034A2 (en) * | 2007-05-24 | 2009-01-13 | Isofibra Participacoes Ltda | Flexible graphite coated double-track serrated metal joint for use at high pressures and temperatures to replace ring joints |
| CN104565618A (en) * | 2015-01-27 | 2015-04-29 | 武汉工程大学 | High-temperature flange sealing structure comprising flexible graphite metal omega-shaped tooth composite gasket |
| GB201508432D0 (en) * | 2015-05-15 | 2015-07-01 | Evenort Ltd | Mechanical seal assembly |
| CN206816998U (en) * | 2017-06-06 | 2017-12-29 | 开原化工机械制造有限公司 | A kind of high-temperature flange sealing structure |
| CN110578844A (en) * | 2019-08-22 | 2019-12-17 | 北京航天动力研究所 | Multistage self-tightening metal sealing structure |
| CN214839102U (en) * | 2021-04-19 | 2021-11-23 | 大连理工大学 | High low temperature high pressure flange connection interface flexible self-locking sealing device |
-
2021
- 2021-04-19 CN CN202110417081.5A patent/CN112963639A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070024007A1 (en) * | 2005-07-28 | 2007-02-01 | Putch Samuel W | Seal ring and method |
| CN200943788Y (en) * | 2006-08-28 | 2007-09-05 | 刘星海 | Impact-resistant high temperature-resistant elastic sealing member and flange matched with same |
| BRPI0702034A2 (en) * | 2007-05-24 | 2009-01-13 | Isofibra Participacoes Ltda | Flexible graphite coated double-track serrated metal joint for use at high pressures and temperatures to replace ring joints |
| CN104565618A (en) * | 2015-01-27 | 2015-04-29 | 武汉工程大学 | High-temperature flange sealing structure comprising flexible graphite metal omega-shaped tooth composite gasket |
| GB201508432D0 (en) * | 2015-05-15 | 2015-07-01 | Evenort Ltd | Mechanical seal assembly |
| CN206816998U (en) * | 2017-06-06 | 2017-12-29 | 开原化工机械制造有限公司 | A kind of high-temperature flange sealing structure |
| CN110578844A (en) * | 2019-08-22 | 2019-12-17 | 北京航天动力研究所 | Multistage self-tightening metal sealing structure |
| CN214839102U (en) * | 2021-04-19 | 2021-11-23 | 大连理工大学 | High low temperature high pressure flange connection interface flexible self-locking sealing device |
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